Finding the Fourth Proportional to 1,015.18, 1,401.05 and 573.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.18 : 1,401.05 = 573.10 : x
2. Step 2: Convert to fraction form
   1,015.18/1,401.05 = 573.10/x
3. Step 3: Cross multiply
   1,015.18x = 1,401.05 × 573.10
4. Step 4: Simplify right side
   1,015.18x = 802,941.76
5. Step 5: Solve for x
   x = 802,941.76/1,015.18
6. Step 6: Final answer
   x = 790.94